A biochemist is studying the mechanism of DNA replication by stopping the reaction shortly after its initiation. Analysis of the products from the reaction in a gel reveals the presence of single-stranded and double-stranded DNA. The shorter fragments of DNA were found to be attached to a complementary sequence of 10 ribonucleotides. which of the following is the most likely explanation for the data?
A - Short fragments of mRNA bind at random to available single-stranded DNA sequences in the cell
B - tRNAs bind to available single-stranded DNA sequences in the cell
C - Short ribonucleotide sequences are the primers for DNA polymerases
D - Short sequences of RNA attached to DNA represent an artifact of the isolation procedure

I'm thinking it is C, not so sure tho

Which organisms have pharyngeal arches that develop from all three germ layers and go through the same development stages as embryos? 1.bird 2.ladybug 3.starfish 4.snake

Where does all the water go? according to the environmental protection agency (epa), in a typical wetland environment, 39% of the water is outflow; 46% is seepage; 7% evaporates; and 8% remains as water volume in the ecosystem (reference: united states environmental protection agency case studies report 832-r-93-005). chloride compounds as residuals from residential areas are a problem for wetlands. suppose that in a particular wetland environment the following concentrations (mg/l) of chloride compounds were found: outflow, 60.4; seepage, 73.7; remaining due to evaporation, 26.4; in the water volume, 46.8. (a) compute the weighted average of chlorine compound concentration (mg/l) for this ecological system. (round your answer to one decimal place.) mg/l (b) suppose the epa has established an average chlorine compound concentration target of no more than 58 mg/l. does this wetlands system meet the target standard for chlorine compound concentration? yes. the average chlorine compound concentration (mg/l) is too high. yes. the average chlorine compound concentration (mg/l) is lower than the target. no. the average chlorine compound concentration (mg/l) is lower than the target. no. the average chlorine compound concentration (mg/l) is too high.

Which of the following is the source of energy for photosynthesis? a.) glucose b.) chlorophyll c.) carbon dioxide d.) sunlight